Sep.Git.Tfs.Commands.Rcheckin.PerformRCheckin C# (CSharp) Method

        private int PerformRCheckin(TfsChangesetInfo parentChangeset, string refToCheckin)
        {
            if (_globals.Repository.IsBare)
                AutoRebase = false;

            if (_globals.Repository.WorkingCopyHasUnstagedOrUncommitedChanges)
            {
                throw new GitTfsException("error: You have local changes; rebase-workflow checkin only possible with clean working directory.")
                    .WithRecommendation("Try 'git stash' to stash your local changes and checkin again.");
            }

            // get latest changes from TFS to minimize possibility of late conflict
            Trace.TraceInformation("Fetching changes from TFS to minimize possibility of late conflict...");
            parentChangeset.Remote.Fetch();
            if (parentChangeset.ChangesetId != parentChangeset.Remote.MaxChangesetId)
            {
                if (AutoRebase)
                {
                    _globals.Repository.CommandNoisy("rebase", "--preserve-merges", parentChangeset.Remote.RemoteRef);
                    parentChangeset = _globals.Repository.GetTfsCommit(parentChangeset.Remote.MaxCommitHash);
                }
                else
                {
                    if (_globals.Repository.IsBare)
                        _globals.Repository.UpdateRef(refToCheckin, parentChangeset.Remote.MaxCommitHash);

                    throw new GitTfsException("error: New TFS changesets were found.")
                        .WithRecommendation("Try to rebase HEAD onto latest TFS checkin and repeat rcheckin or alternatively checkins");
                }
            }

            IEnumerable<GitCommit> commitsToCheckin = _globals.Repository.FindParentCommits(refToCheckin, parentChangeset.Remote.MaxCommitHash);
            Trace.WriteLine("Commit to checkin count:" + commitsToCheckin.Count());
            if (!commitsToCheckin.Any())
                throw new GitTfsException("error: latest TFS commit should be parent of commits being checked in");

            SetupMetadataExport(parentChangeset.Remote);

            return _PerformRCheckinQuick(parentChangeset, refToCheckin, commitsToCheckin);
        }